ASP.Net MVC5中DropDownlist的困难

Question

I'm struggling with dropdownlist tried several methods online and all failed will show the methods that I tried.

Objective Create a Reciept with date,reference... & country. Country is Required and should be a dropdownlist.

So the Table for Reciept ("ID, Name, Date, Address, City, CountryList).

RecieptModel

public class TransactionModel
{
    public int ID { get; set; }
    public int Name{ get; set; }
    public DateTime Date { get; set; }
    public string Address { get; set;}
    public string City { get; set; }
    public CountryList CountryList { get; set; }
}

public class ApplicationDbContext : DbContext
{
    public DbSet<RecieptModel> Reciepts { get; set;}
    public DbSet<CountryList> coutryList { get; set; }
}

CountryList

public class CountryList
{
    public byte Id { get; set; }

    public enum Country
    {
        Germany,
        US,
        UK
    }
}

Controller

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "ID,Name,Date,City,CountryList")] Reciepts reciepts)
{
    if (ModelState.IsValid)
    {
        db.Reciepts.Add(reciepts);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(reciepts);
}

View

<div class="form-group">
    @Html.LabelFor(model => model.CountryList, new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EnumDropDownListFor(model => model.CountryList)
        @Html.ValidationMessageFor(model => model.CountryList)
    </div>
</div>

This failed I looked for several examples I'm trying to do it without the use of javascript. In the End I just want to learn how to implement a Dropdownlist & save it to the database allot of the methods that I tried to implement failed in MVC5.

Answer 1

I would sugest you to add a html extension method that implement dropdownlist for a generic enumarator. Take a look at this answer .

Answer 2

There is slightly change in your view where you bind the Country

this is actually you write

 @Html.EnumDropDownListFor(model => model.CountryList)

Change is need to add name property in your country list (it must be ID that is your taken in your model) , so it must be like this to maintain country list value

@Html.DropDownListFor(model => model.CountryList.Id, new SelectList(model => model.CountryList)

Becouse every HTML control need unique indentifier